The Freehand was powered by two non-afterburning Soyuz Tumanskiy/Khatchaturov R-27-300 turbojet engines (11,000 lb thrust each) mounted forward of and below the cockpit. They were fitted with louvered nozzles, which were vectorable through about 90º and exhausted at the center of gravity (c.g.), similar to the Bell X-14 (#18). Engine bleed air was used for reaction control nozzles at the tip of each wingtip fairing, on the tailcone, and at the tip of a ten foot long nose "probe." The overall length was 57.5 ft long (including the nose probe), with a wingspan of 27 ft. Empty weight was 12,346 lb, maximum take-off weight was 20,723 lb.

The Yak-36 made its first untethered hover on 9 January 1963. From there, the flight envelope was slowly expanded, with a double transition from vertical take-off to forward flight and back to vertical landing performed on 16 September 1963. A number of retractable doors (including a large "apron" under the nose) were fitted to reduce hot gas reingestion. It was only capable of vertical take-offs and landings. The first public display was at the Soviet National Aviation day on 7 July 1967 at the Domodedovo Air Show. The Yak-36 was a technology demonstrator that eventually led to the operational Yak-38 Forger.

Source: AHS V/STOL Wheel

Overview

Data on design, manufacture and status

Design authority: Joint Stock Company A. S. Yakovlev

Primary manufacturer: Joint Stock Company A. S. Yakovlev

Parent type: No type defined

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Jet lift VTOL

Compound type: N/A

Lift configuration: Vectored thrust (x2)

Dedicated control device: Thruster (x4)

Crew required: 1

Crew seating: Single seater

Landing gear: Wheels (all retractable)

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height:  
Overall Length:  
Overall Width:  
Airframe Dimensions
Airframe Length:  
Airframe Width:  
Airframe Height:  
Landing Gear Dimensions
Landing Gear Base:  
Landing Gear Track:  
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width:  

Weights and Performance

Data on aircraft weight and flight characteristics

Weights
Max Gross Weight (ground): 9,400 kg 20,723 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 9,400 kg 20,723 lb
Empty Weight:  
Useful Load:  
Empty Weight Fraction:  
Climb Performance
Max Rate of Climb:  
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Limitations
Max Level Flight Speed:  
Never Exceed Speed:  
Service Ceiling:  
Range and Endurance
Max Range:  
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

Provided powerplant data is for uninstalled, sea level, static operations.

Powerplant
Number of engines: 2
Designation: Tumansky R-27-300 turbine
Manufacturer: Tumansky/Khatchaturov
Normal Ratings
Max continuous:  
Take-off / rated:  
Intermediate:  
Maximum:  
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Main Rotor Characteristics
Diameter:  
RPM:  
Direction of Rotation: Unknown
Hub Type:  
Main Rotor Blade Characteristics
Blade Construction:  
Blade Chord:  
Blade Tip Geometry:  
Blade Twist:  
Number of Blades:  
Main Rotor Derived Characteristics
Disc Area:  
Disc Loading:  
Solidity:  
Main Rotor Blade Derived Characteristics
Blade area per blade:  
Tip Speed:  

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Diameter:  
Configuration: Unknown
Direction of Rotation: Unknown
RPM:  
Tail Rotor Blade Characteristics
Number of Blades:  
Blade Construction: N/A
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area:  
Solidity:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

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Related Public Resources

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